Middlings-purifier and dust-collector.



No. 689,34I. Patented Dec'. I7, |90l. A. WOLF.

mnnLlNGs PumFlEn AND nusT coLLEcTon.

(Application led July 8, 1898.)

4 Shentsfsheet l.

(No Model.)

, Tw: Nowar: PETERS co. wow-Luna. wAsnwsYoN, u. c

No. 689,34l. Patented nec. {7,1901.

A WDLF.

MIDDLINGS PUBI'FIER AND DUST GOLLECTR.

(Application med my s, 189s.) i v k (No model.) I 4-sheetssneee 2.

No. 689,34l. Patented Dc. I7, |901. A. WULF.

MIDDLINGS PURIFIER AND DUST 'CLLECTUIL (Application led July 8, 1898,)

4 Sheets-Sheet 3.

(No Model.)

No. 689,34l. 'Patented nec. I7, lam. A. woLF.

MIDDLINGS PURIFIER AND DUST COLLECTOR.

(Applicatiun led July 8, 1898A (No Model.) 4 Sheets-'Sheet 4.

Nrn-3D STATES ATENT MlDDLlNGS-PURIFIER AND DUST-COLLECTOR.

SPECIFICATON forming part of Letters Patent No. 689,341, dated December 17, 1901.

Application filed July 8,1898. Serial No. 685,432. (No model.)

T0 all whom ttm/Coy concern:

Be itknown that I, AUGUSTUS WOLF, a citi-I forth, reference being had to the accompanying drawings, in which- Figure 1 is a longitudinal sectional-view of a combined middlings-purifier and dust-collector constructed in accordance with my invention. Fig. 2 is a transverse section of the same on the line a: x, Fig. 1. Fig. 3 is a plan View of the separator-screen. Fig. 4 is a transverse section on the line w w, Fig. 1; and Fig. 5 is a sectional view illustrating a special construction of part of the machine.

v,1 represents the fixed outer casing of the machine, which has at one end a projecting bracket 2, having bearings for the drivingshaft 3, on which is an eccentrica, connected by a spring-rod 5 to the separator-frame b', the latter being mounted within the casing l upon inclined elastic suspension-arms 7, which have winged heads adapted to slotted bearings in plates 9, secured upon the outside of the frame near the top of the same, as shown in Fig. 1, whereby the elastic suspension-arms are retained in the inclined position, as shown in said gure. Hence as the separator-frame is reciprocated by means of the eccentric 4 said separator-frame is caused to have at the same time an up-and-down movement of limited extent, so as to effect the thorough agitation of the material passing over the screen 10 with which said separater-frame is provided. Y

The `middlings are fed into the machine through the feed-spout 11 at one end of the same and are distributed by a notched bar 12 at the head end of the separator-frame G, and as they pass over the screen 10 they are subjected to the action of an upward flow of air induced bya fan 13 at the top of the casing,' clogging of the screen being prevented by the whipping action of the cords 14, which are connected at oney end to a bar 15 on the separator-frame and at the other end' to a fixed bar 16, mounted in suitable brackets at one end of the casing 1.

On the screen 10 of the separator-frame are sage over the screen from the head end to theV tail end of the same, -because of the portions passing through the screen and of the other portions carried upward by the blast, the area of the bolting-cloth for the reception of the middlings correspondingly diminishes. Hence there is a substantially uniform layer of middlings upon said screen from end to end and a consequent uniformity in the action of the blast which would not be attained if some portions of the screen were more lightly covered than others and hence afforded a freer passage for the air.

Outside of each of the bars 17 the screenframe is provided with an imperforate bottom 18.

A single bar extending diagonally across the screen might suffice in some cases; but the use of the two inclined bars is preferred.

On the screen-frame 6 are a series of transverse bars 19, which support longitudinal troughs or trays 20, the latter thus partaking of the movement of the screen-frame 6. The transverse frames 19 also divide the space above the separator-screen into a series of chambers 2 l, which are continued in the space above the trays 2O by means of transverse partitions 22, forming part of the fixed structure of the machine, a double inclined deiiector 23 running throughout almost the entire length of the machine above the longitudinal opening which intervenes between the troughs or trays 20.

I-Iung to the elastic suspension-armsf? are imperforate trays 24, and above the latter is a chamber 25, communicatingv with the inte.- rior of the casing containing the fau 13, and

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below said casing is a longitudinal bar 26, with transverse projecting blades or plates 27, corresponding as to longitudinal position with the partitions 22, and between and beyond these plates 27 are hung on each side of the central longitudinal bar 26 valves 29, which are connected by cords or wires 30 to arms 3l on rock-shafts 32, mounted in the upper portion ot the fixed casing of the machine and having on the outside of said fixed casing slotted segments 33, held in position by thumb-nuts 34, so that either one of the valves 29 can by the adjustment of its corresponding segment he raised or lowered to any desired extent.

The separator-screen 10--that is to say, the portion contained between the longitudinal ribs or bars 17-discharges into a box 35 at the end ot' the frame 6, this box being closed at the sides, top, and rear end, but open at the forward end to receive the material from the central portion of the screen and also open at the bottom, so as to discharge said material into a hopper 36, which communicates with a box 37, containing aswinging valve 38, which may be adjusted, as shown by full lines in Fig. 1, so as to direct the material toward an outer flexible Valve 39, whereby it may be discharged on the outer side of the casing, or the valve 38 may be adjusted, as shown by dotted lines in Fig. 1, so as to direct the material through a like iiexible valve 40 on the inside of the box 37 to the lower portion of the casing 1.

The current of air passing upward through the separator-screen 10 carries with it such impurities as are susceptible of being raised and carried along with said air-current, the heavier of these impurities dropping onto the imperforate plates or other surfaces 18 outside of the bars 17 and being delivered on either side of the box 35, whence they pass through side passages into a chamber below the box 37, from which chamber they are discharged through a flexible valve 4l. The lighterimpurities are carried upward into the chambers 21, where, owing to the greater cubic capacity of these chambers, the force of the blast is lessened. Hence other impurities drop onto the troughs or trays 20, which deliver them onto the top of the box 35, the latter in turn delivering them onto a conical delector 42 above the box 37, whereby they are directed to the side passages and thence to the chamber which discharges through the valve 41. The air-blast, carrying the remaining impurities with it, now passes upward and outward beneath the valves 29 and thence into the enlarged chamber 25 above said valve structure, where the force of the blast is still further lessened, the light impurities being deposited upon the collector-plates 24, which deliver their accumulations into the side chambers and onto the top ofthe box 35, where they join those delivered from the troughs or trays 20 and side plates 18 of the screen-frame 6 and accompany the same in their subsequent course,the air being discharged th rough the outlet-passage ofthe fan practically free from dust.

In the structure shown in Fig. 5 the fan 13 discharges into a chamber 43, extending completely across the dxed structure ot' the machine and having an inclined or trough-shaped bottom, thus providing still another settlingchamber for dust. Hence this construction may be adopted in cases where the direct discharge from the fan is found to be objectionable, for as the chamber 43 extends across the entire width of the machine, while the fancasing is of contracted lateral dimensions, as shown in Fig. 2, the expansion in the area of said chamber 43 causes such reduction in the speed of flow ofthe air-current that even the lightest impurities will be deposited on the bottom of said expansion-chamber before the air escapes from the top of the same;

Owing to the use of the valves 29 the strength ofthe currentliowingthrough anyofthechambers above the separator-screen can be readily regulated as circumstances and the character of the material being treated may suggest, and in any case there are successive expansions of the air-current attended with corresponding decrease in the force of the same, so as to permit of the depositing of the impurities in the special trays or receptacles provided for this purpose.

At the bottom of the fixed casingis a duplex conveyer 44 45, above which are transverse partitions 46 and laterally-swinging valves 47, whereby the material passing through the separator-screen 10 can be directed to either conveyer, as desired.

Each of the conveyer-shafts has a bevelwheel 49, meshing with a bevel-pinion 50`on a transverse shaft 51, mounted in bearings at one end of the fixed casing and havinga pulley 52, which is driven by a belt 53 from a pulley 54 on the shaft 3, another pulley 55 on said shaft receiving a belt 56, which drives the pulley 57 on the shaft of the fan 13.

Having thus described my invention, I claim and desire to secure by Letters Patent- 1. The combination in a middlings-puriier, of a separator having a screen portion which receives the middlings and a collecting portion discharging independently of said screen portion, provision for causing an upward current of air through said screen, a pair of separated deflectors located above the screen and tending to throw the main current of air and the material carried thereby outward over the collecting portion of the separator, said deiiectors also forming trays which receive ma-l terial deposited by the air-current and dis charging independently of the screen, and a supplementary detlector located above the space between the said pair of separated deflectors, substantially as specified.

2. The combination in a middlings-purier, of a separating-screen, transverse partitions forming a series of chambers above the same,

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valves governing the discharge from said airchambers, and trays or receptacles for receiving material deposited bythe air-current both before and after the same passes said valves, said trays or receptacles discharging independently of the separator-screen, substantially as specied.

4. The combination in a middlings-puriier and dust-collector, of a separator-screen having a closed box for receiving the tailings therefrom, provision for causing a flow of air upwardly through said separator-screen, and trays or receptacles for receiving material deposited by said air-current, said trays or receptacles discharging over and around the box which receives the tailings from the separator-screen, substantially as speciied.

5. The combination in a combined middlings-purilier and dust-collector, of a separating-screen, means for causing a flow of air through the same, successive chambers of increasing area through which the air is caused to pass, and trays or receptacles in said chambers for receiving the material deposited by the air in its passage, substantially as speciiie In testimony whereof I have signed my name to this specification in the presence of 4o two subscribing Witnesses.

AUGUSTUS WOLF.

Witnesses:

Jos. H. KLEIN, F. E. BEoHToLD. 

